Brillouin microscopy for the evaluation of hair micromechanics and effect of bleaching
Correa, N; Alunni Cardinali, M; Bailey, M; et al.Fioretto, D; Pudney, PDA; Palombo, F
Date: 26 March 2021
Journal
Journal of Biophotonics
Publisher
Wiley
Publisher DOI
Abstract
Brillouin microscopy is a new form of optical elastography and an emerging technique in
mechanobiology and biomedical physics. It was applied here to map the viscoelastic properties of
human hair and to determine the effect of bleaching on hair properties. For hair samples, longitudinal
measurements (i.e. along the fibre axis) ...
Brillouin microscopy is a new form of optical elastography and an emerging technique in
mechanobiology and biomedical physics. It was applied here to map the viscoelastic properties of
human hair and to determine the effect of bleaching on hair properties. For hair samples, longitudinal
measurements (i.e. along the fibre axis) revealed peaks at 18.7 GHz and 20.7 GHz at the location of
the cuticle and cortex, respectively. For hair treated with a bleaching agent, the frequency shifts for
the cuticle and cortex were 19.7 GHz and 21.0 GHz, respectively, suggesting that bleaching increases
the cuticle modulus and - to a minor extent - the cortex modulus. These results demonstrate the
capability of Brillouin spectroscopy to address questions on micromechanical properties of hair and
to validate the effect of applied treatments.
Physics and Astronomy
Faculty of Environment, Science and Economy
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